SY20122A1ABC - High Efficiency, 1.5MHz, 2A Buck


  • 2.5V to 5.5V Input Voltage Range
  • 50μA Low Quiescent Current
  • Low RDS(ON) for Internal Switches (Top/Bottom) 130mΩ /85mΩ
  • High Switching Frequency 1.5MHz Minimizes the External Components
  • Internal Soft-start Limits the Inrush Current
  • 100% Dropout Operation
  • Hic-cup for Short Circuit Protection
  • Power Good Indicator
  • Output Auto Discharge Function
  • RoHS Compliant and Halogen Free
  • Compact Package: SOT23-6

Typical Application


The SY20122A1 is a high efficiency 1.5MHz synchronous step down DC/DC regulator, which is capable of delivering up to 2A output current. It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
The low output voltage ripple, the small external inductor and the capacitor sizes are achieved with 1.5MHz switching frequency.


  • Set Top Box
  • USB Dongle
  • Media Player
  • Smart Phone